A bite is fatal and death causes zombication. I guess cutting the leg off stops the infection from getting to the brain.

It is really amazing how strong a bite from a dead person is, I mean it can go through a trouser leg or anything. It seems the ligaments to the jawbone would be so decayed it would fall off. Creative license perhaps? Like when one ripped Dale's stomach open. Would decayed hands be that strong. Oh, well it is great entertainment.

Herschel is seventy. It seems they would keep him back for shooting and not melee fighting. We have a death coming up according to the grave in the preview. I say it will not be Herschel, but I go into the Death Pool that it will be the little blonde parakeet next.